PlainWater
States → Louisiana

Community Water System · PWS LA1099002

Bayou Teche Water Works

Loreauville, Louisiana 70552 - drinking water served from groundwater sources to 10,137 people, tracked in EPA SDWIS and UCMR5.

10,137
People served
113
EPA violations
79
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 113 drinking-water violations at Bayou Teche Water Works, 70% of them health-based - above the Louisiana per-system average.

113
Total EPA violations on record
70%
Health-based (MCL / treatment failure)
10,137
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Bayou Teche Water Works

Bayou Teche Water Works is a private-owned community water system that delivers drinking water to 10,137 residents in Loreauville, Louisiana (St. Martin Parish County) through 3,379 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 113 total violations for this system , of which 79 (70%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 27 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Total Haloacetic Acids (HAA5), recorded in 25 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Louisiana, EPA tracks 1,234 public water systems serving 5,316,532 people, with 115,060 cumulative violations and 62,164 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 93.2 violations. Statewide, 218 of 265 UCMR5-tested systems have reported PFAS detections (82.3%).

Bayou Teche Water Works's 113 violations sit above the Louisiana average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
10,137
Total Violations
113
Health-Based Violations
79
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
3,379
County
St. Martin Parish
School/Daycare
No
MCL Violations
61
Monitoring Violations
27
Treatment Tech Violations
18

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Total Haloacetic Acids (HAA5) MCL 25 2015
TTHM MCL 24 2015
Groundwater Rule TT 17 2022
Total Haloacetic Acids (HAA5) MR 13 2014
Coliform (TCR) MCL 12 2014
TTHM MR 8 2014
Chlorine MR 4 2018
Lead and Copper Rule MR 2 2017
LEAD AND COPPER RULE REVISIONS TT 1 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.

Contaminant Date Result MRL Status
PFNA 4/4/2023 <4.00 ppt 4.00 ppt Not Detected
ADONA 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 4/4/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 4/4/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 4/4/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
PFOS 4/4/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 4/4/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 4/4/2023 <4.00 ppt 4.00 ppt Not Detected
NMeFOSAA 4/4/2023 <6.00 ppt 6.00 ppt Not Detected
NFDHA 4/4/2023 <20.00 ppt 20.00 ppt Not Detected
PFTA 4/4/2023 <8.00 ppt 8.00 ppt Not Detected
PFPeA 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 4/4/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 4/4/2023 <5.00 ppt 5.00 ppt Not Detected
PFPeS 4/4/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 4/4/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 4/4/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 4/4/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 4/4/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 4/4/2023 <7.00 ppt 7.00 ppt Not Detected
PFTrDA 10/16/2023 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 10/16/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 10/16/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 10/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 10/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 10/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 10/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 10/16/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 10/16/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 10/16/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 10/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 10/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 10/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 10/16/2023 <2.00 ppt 2.00 ppt Not Detected
PFBS 10/16/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 10/16/2023 <2.00 ppt 2.00 ppt Not Detected
PFTA 10/16/2023 <8.00 ppt 8.00 ppt Not Detected
HFPO-DA 10/16/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 10/16/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 10/16/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 10/16/2023 <3.00 ppt 3.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Bayou Teche Water Works.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID LA1099002 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Louisiana Drinking Water Authority

Louisiana's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find LA regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / LA1099002 / 5200
2022 Groundwater Rule TT 17 SDWIS / LA1099002 / 0700
2018 Chlorine MR 4 SDWIS / LA1099002 / 0999
2017 Lead and Copper Rule MR 2 SDWIS / LA1099002 / 5000
2015 Total Haloacetic Acids (HAA5) MCL 25 SDWIS / LA1099002 / 2456
2015 TTHM MCL 24 SDWIS / LA1099002 / 2950
2014 Total Haloacetic Acids (HAA5) MR 13 SDWIS / LA1099002 / 2456
2014 Coliform (TCR) MCL 12 SDWIS / LA1099002 / 3100
2014 TTHM MR 8 SDWIS / LA1099002 / 2950

How Bayou Teche Water Works Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Bayou Teche Water Works Louisiana avg Federal benchmark
Total violations 113 93.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 79 50.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 82.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 10,137 4,308 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,234 regulated public water systems in Louisiana.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Bayou Teche Water Works water safe to drink? ▼
Bayou Teche Water Works (PWS ID: LA1099002) has 113 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 10,137 people using Groundwater sources.
How many people does Bayou Teche Water Works serve? ▼
Bayou Teche Water Works serves 10,137 people in Loreauville, Louisiana. It is a Private-owned system using Groundwater water sources with 3,379 service connections.
What type of violations does Bayou Teche Water Works have? ▼
Bayou Teche Water Works has 113 total violations: 79 health-based violations (MCL exceedances or treatment failures), 27 monitoring/reporting violations, and 18 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Bayou Teche Water Works water? ▼
No. Bayou Teche Water Works was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Bayou Teche Water Works use? ▼
Bayou Teche Water Works uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.